JPS6214807Y2 - - Google Patents

Description

[Detailed description of the invention] This invention allows the forceps to be inserted into the channel of the endoscope.
The present invention relates to cell collection forceps for collecting cells within a body cavity.

Generally, an endoscope consists of a flexible insertion tube A, an operating section B, an eyepiece section C, and a light guide cable section D, as shown in Fig. 1.The flexible tube A has an optical fiber for observation. A bundle 1, an illumination optical fiber bundle 2, a forceps channel 3 for inserting forceps, and the like are housed. The tip 4 of the flexible insertion tube A is connected to the forceps channel opening 3a and the light emitting end surface 2 of the illumination optical fiber bundle 2.
a, an objective lens 5 and a front end surface 1a of the optical fiber bundle 1 for observation;
The image formed on the front end surface 1a is conveyed to the rear end surface 1b of the eyepiece C by the observation optical fiber bundle 1. The examiner looks through the eyepiece 6 and observes the rear end surface 1.
Observe the image of the test area shown in b. In addition to the distal end portion 4, the flexible insertion tube A also includes a curved portion 7 that can be bent by operating the operating knob 9 of the operating portion B in order to orient the distal end portion 4 in a desired direction. It consists of a soft part 8 that deforms according to the system shape of the body cavity.

In order to collect cells from a patient's body cavity for use in cell testing for patient diagnosis using an endoscope as described above, first, the area to be examined is observed using an endoscope inserted into the patient's body cavity. Then, the forceps are inserted into the forceps channel 3 of the endoscope, and the forceps are made to protrude from the forceps channel opening 3a of the distal end portion 4 to collect cells from the above-mentioned collection site. At that time, depending on the state of the lumen near the collection site, cells must be collected with the curved part 7 in a curved state. The forceps channel 3 is also curved in accordance with the curve of the curved portion 7. For this reason, in conventional forceps, as shown in FIG.
The hard part of the forceps is hooked to the curved inner wall of the forceps channel 3, making it difficult or impossible to insert the forceps therethrough. At that time, if you try to forcefully insert the forceps, the hard part will deform the forceps channel 3, press the other stored items, especially the optical fiber bundles 1 and 2, and eventually push the optical fiber bundles 1 and 2. It may break and make the endoscope unusable.

The present invention was made in order to solve the above-mentioned problem, and the opening/closing mechanism of the collection cup of forceps is
By making the length along the axis shorter than the conventional one using a link mechanism and making the cup swingable relative to the fixing fitting, the forceps channel is curved due to the curvature of the endoscope. To provide cell collection forceps that can be smoothly inserted into cells.

Hereinafter, the present invention will be described in detail according to the preferred embodiment shown in FIGS. 4 to 6.

10 is a sheath that can be inserted into the forceps channel 3 of the endoscope (see FIGS. 1 to 3), and 11 is an operating wire that is inserted through the sheath 10. A movable fitting 12 is attached to the end of the operating wire 11 by brazing or crimping, and a cap portion 13a of a fixing fitting 13 is fitted to the end of the sheath 10. The cap portion 13a has a hole that allows the movable metal fitting 12 to move forward and backward, and the fixed metal fitting 13 is also provided with a support portion 13b that projects from the cap portion 13a. Two cups 14, 14 are supported on the support part 13b by shafts 15, 15, respectively, and arms 14a of the cups 14, which extend across each other, are provided with a through groove 1.
4b, and a shaft 16 installed in the movable fitting 12 is inserted freely through the through groove 14b. Further, a shaft hole 17 is formed in the support portion 13b of the fixture 13, and the end portion of the shaft 16 is allowed to move within the shaft hole 17. The shaft hole 17 is
It is formed into a substantially triangular shape having an apex 17a equidistant from both the axes 15, 15 near the axes 15, 15, and a base 17b bulging toward the cap portion 13a.
Other possible shapes of the shaft hole 17 include an elliptical shape having a long axis in the axial direction of the forceps, and a triangular shape with the base 17b not curved.

When the operating wire 11 of the cell collection forceps having the above configuration is pushed to the left in FIG. 4, the shaft 16 moves within the through hole 14b to the base of the arm 14a as the movable fitting 12 fixed to the operating wire 11 moves. As the arms 14a, 14a move and thereby bring the root portions of the arms 14a, 14a closer together, the cups 14, 14 are spaced apart from each other, as shown in FIG. In this state, the cell collection forceps are protruded toward the collection site, and the cells (not shown) at the collection site are collected with the cup 14,
I can stay between 14 and 14. Next, when the operating wire 11 is pulled to the right in FIG.
Since the ends of a and 14a are brought closer to each other, the cups 14 and 14 are brought closer to each other and abut each other as shown in FIG. 4 again. At that time, Cup 14,
Cells sandwiched between cup 14 (not shown)
4 is cut by a blade (not shown) provided on the outer periphery of the cup 4 and housed in the cups 14, 14.

The state of the cup 14 in this embodiment when it swings is as follows:
This will be explained below. Since the shaft hole 17 provided in the fixture 12 is shaped and sized so that the shaft 16 can move within the shaft hole 17, the cups 14, 14 can easily swing about the shaft 15 relative to the fixture 13. It becomes possible. As a result, even if the forceps channel 3 is curved, the cups 14, 14 can be bent as shown in FIG.
Since the forceps are bent with respect to the fixing fitting 13 according to the curvature, the forceps can smoothly pass through the curved forceps channel 3. Further, when the shaft 16 is inserted through the curved portion, the shaft 16 is moved into the shaft hole 17 by the swinging of the cups 14, 14.
Even if the shaft 16 is located at the end of the base 17b, force is applied to the shaft 16 by operating the operating wire 11 during cell collection, and as the shaft 16 moves within the through hole 14b to the base of the arm 14a, Since the end of the shaft 16 comes into contact with the oblique side of the shaft hole 17 and eventually reaches the apex 17a, the cups 14, 14 open and close so that each cup 14 is equiangular to the axis of the forceps.

According to the cell collection forceps having the above configuration, the length along the axial direction of the opening/closing mechanism of the forceps cup is shortened, and the forceps cup can be adjusted in accordance with the curvature of the forceps channel due to the curvature of the curved part of the endoscope. The forceps can be smoothly inserted into the forceps channel since it swings relative to the fixing fitting and the sheath. As a result, the tip of the endoscope becomes unstable due to forceful insertion of the forceps.
I have never had a case where a cell sampling site within a body cavity, which was found through endoscopic observation, was out of the field of view after forceps were inserted. In addition, since the forceps can be inserted smoothly, the hard part does not press the optical fiber bundle for observation, the optical fiber bundle for illumination, etc. stored in the curved part through the forceps channel when the forceps are inserted. Therefore, the optical fiber bundle does not break. In addition, since the insertion is easy and there is no need to search for the cell collection site again after insertion, cell collection can be completed quickly, patient pain can be shortened, and the examiner can be fatigued. There are also few.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a general endoscope, Fig. 2 is a vertical side view showing the curved part of the endoscope in a curved state, and Fig. 3 shows a conventional forceps inserted into a forceps channel in a curved state. FIGS. 4 to 6 are partially vertical side views showing an embodiment of the present invention. 3...forceps channel, 7...curved part, 10...
... Sheath, 11 ... Operation wire, 12 ... Moving metal fitting, 13 ... Fixed metal fitting, 14 ... Cup, 14a
...Arm, 14b...Through groove, 15, 16...
Shaft, 17...Shaft hole.

Claims (1)

[Scope of utility model registration request] Sheath 1 that can be inserted into the forceps channel of an endoscope
0, an operating wire 11 inserted through the sheath 10,
A moving metal fitting 12 fixed to the terminal of the operating wire 11
and a fixing metal fitting 13 consisting of a cap part 13a fitted to the sheath 10 and a supporting part 13b protruding from the cap part 13a, which has a hole that allows the movable metal fitting 12 to move forward and backward; Cups 14, 14 are pivoted on the supporting portion 13a.
and a shaft 16 implanted in the movable fitting 12,
A forceps for cell collection in which a shaft 16 passes freely through a through groove 14b formed in an arm 14a, and a shaft hole 17 is formed in a support portion 13b of a fixture 13 to allow movement of the end of the shaft 16.